Rotary valve for explosive-engine.



13.1. SCHOFIELD. ROTARY VALVE FOR EXPLOSIVE ENGINES.

I APPLICATION FILED NOV. l6. I914- 1,190,595.

Patented July 11, 1916.

ooocouu IIVI/EIVPTOR UNITED STATES PATENT OFFICE.

' enonon L. scrrormrn, 'orxn'nsnsorrr, mssounr.

no'rnw vA vr:

To all whom it may concern: I

Be it known that'I, GEORGE L. SoHormLn, a 'citizen'of the United States.residing at Kansas City, in the county of Jackson and State of Missouri,haveinvented certain new and useful Im rovements in Rotary Valves forExplosive ngines; and I do declare the following to'be a-full, clear,and exact description of the invention, such as will enable othersskilled in theart-to which it ape pertains to make and use the same,reference being had to the accompanying drawings, and to the letters andfigures of reference marked thereon, which form a part of thisspecification.

My invention relates to a rotary valve for explosive engines, and hasfor its principal object to provide a rotary valve wherein the impactoccasioned by explosion of gas within an engine cylinder, is balanced toobviate uneven pressure and strain on the'valve and its inclosing parts.In accomplishing this object I have provided the improved details ofstructure, the prefeiried'embodiment of which is illustrated in theaccompanying drawings, wherein Figure I is a perspective viewof anexemplification of an explosive engine in which I my improved valve maybe used. Fig. II

is a longitudinal vertical section of the same.

Fig. III is a transverseyertical section on the line III-III of Fig. II.Fig. IV is a detail perspective view 'ofthe rotary valve.

' Fi V is a perspective view ofa retaining- 'col er in the delivery endofthe valve hous-' ing. Fig. VI is a detail perspective view of thevalve balancing cup or thimble.

- Referring more in detail to the parts 1 designates an explosive engineof. an ordinary vertical type and is here shown merely to facilitate theillustration of my improve ments, and with the understanding that thevalve may be combined in a horizontal engine, vertical engine, or othertypes of explosive engines.

The engine 1 comprises a cylinder 2,.

wherein charges of fuel are exploded, and a valve housing 3 comprisingmechanism for controlling the passage of fuel to the-cylinder, thecompression and ignition of the charge and exhaustion ofthe burnt orspent .gases at properintervals.

The specific construction of the housing" 3' comprises interior-chambers5 and 6 of Specification of Letters Patent.

, Revolubly mounted FOR EXPLOSIVE-ENGINI.

Patented July 11, 1916.

'ippllcati on filed November 16, 1914. Serial No. 872,389.

different diameter, the large chamber being at the outer end of thehousing and having an annular seat 7 on account of the difference indiameter between the two chambers. within the smaller chamber 5 is arotary valve 9, having a port 11 therein adapted for independentcommunication with the intake and exhaust ports 12-43, that extendthrough the housing 3 to the chamber 5 from the respective intake andexhaust conduits l4- 15 that are fed from a suitable carbureter and maydeliver through a suitable muflier, not shown; The valve 9 has anintegral end 17 that closes its outer end and forms a cup-shapedstructure that fits snugly within the chamber 5 to obviate the escape ofgas or vapor between the rotating or valve-ring and the inner surface ofthe housing and obviating of stufling boxes or packing 1 -intake andexhaustports are located adjacent each other, the single balancing portmay be located diametrically opposite a point midway between the intakeand exhaust ports, so that expansion of gases within the cylinder andexplosion chamber may not cause unequal pressure or strain on therotating valve; the cup 10 also protecting the rotat ng valve 9 fromcarbon and heat of the explosion. The open end of the cup 10 g has aflared mouth 24 overlying the beveled outer end 25 ofthe valve ring!)and is provided with a flange 26 which overlies the seat 7 in the valvehousing and is preferably separated therefrom by a packing ring -26 tobetter ins'urez'igainst'the leakage of gas through, the joint. i J

The cup 10 is held in place by a retaining collar-'28, which ispreferably formed inte gral with a cap 29 ithat may be attached to Ythehousing by bolts 30 and sealsthe valve.

chamber, the sleeve being provided with sockets 31 for receivi g theends of dowel-" pins 32 that project from thering flange 26. The sleeve28 is provided with a port 33 through which .the charges of fuel vapormay be delivered from the outer valvechann her into the interior of thecylinder.

A spark plug;- 3+ is preferably arranged diametrically opposite theintake and exhaust ports and in alinement with the balanee port id inthe valve. cup,lso that when the sparker is energized to ignitethccharge of fuel. itis ex nised to the interior ofthe valve chambenlmtiscovered by the rotary valve immediately following the ignition,

thereby protecting the. plug from. the oil and heat and therebypreventing the accu mulation of carbon onthe plug.

In order to rotate the valve S) in proper synchronism with thesparking.mechamsm,

I provide a shaft35, which is .revolubly v i i mounted in a. bearingboss do on the end of i 35 projects through its bearin f. \Yith thevalve in place the cup is dropped into the valve chamber with itsannular flange rest inp, on the packing ring and. the cap with itscollar next installed, so that the doweh pins on the valve cup projectinto the sockets in the inner end of the (EOllil'lZ. With the partssoarranged and opcratively connected with the engine driving mechanism.the valve cup is held against rotation. while rotation of the shaft 3:)will rotate the valve ring, so that communication is established atproper intervals between thexintake and exhaust ports; the operation inthis respect being that ol any ordinary explosive engine, except as tothe method of securing the communieations by therotary member instead ofthe usual puppet valves.

With a construction of this character,

were the cup 10 closed except for the in-/ take and exhaust ports, whena charge would he exploded in the cylinder the explosion of each chargewould exert apressure through the cup ports against the rotary valvering which would tend todrive the ring outwardly and thereby exert aretard ing contact of the ring: on the inner-face of the housing. and asthe presence of the intake and exhaust ports in alinement with the likeports in. the valve cup wouldatlord no backing for the rotary ring; atsuch points, there would he a tendency to force the ring to wear out ofshape. particularly after repeated explosions. In order, how ever. tobalance the pressure on the valve ring, I have provided the balance portin tion with the housing ports, and havin by Letters-Patent, is:

1. A rotary valve comprisinga housing havinginner and outer valvechainbers and provided with intake and exhaust ports and with a sparkplug, a rotary sleeve mounted in one of the chambers, and having a portadapted for communication with either of the housing ports and forexposing said plug to the interior of the chamber, a valve cup locatedwithin the sleeve and having intake and exhaust ports adapted forcommunicw an opposite balance port in alinement with the allve port, asleeve in the other valve chamber having pin and. dowetconnection withthe valvecup, means for holding the sleeve against rotation, means forclosing the outer end of the second chamber and holding the collar inplace, and means for rotating said sleeve.

A rotary valvecomprising a housing having a valve chamber and intake andexhaust ports opening to said chamber, a spark plug exposed to theinterior of said chamber, a cup in the chamber spaced from the housing,the said cup having intake and we haust ports adapted for communicationwith a 100 the intake and exhaust ports in the housing and having a portthrough which a spark from said plug; may be projected to the interiorof the cup and a valve member rota.- tably mounted between the cupandhousing and having a port adapted for passing the intake and exhaustports and the spark plug 111 proper sequence. l p

A rotary valve comprisingashouldered valve chamber and having intake andexhaust ports opening to said chamber, a cup located in said valvechamber and an end flange seated against the shoulder thereof,

the said cap having separate intake, exhaust l I claim as new therein,and desire to secure and spark ports. and a valve member rotatablymounted between the cup and housing and having a single port adapted forexposing the housing intake and exhaust ports and the spark plop to theproper cup ports in determined sequence.

4. A rotary valve comprising a. housing having. an interior chamberclosed at one end and having a shoulder at its opposite end,

the said casing having separate intake and exhaust ports and having aspark plug exposed to its interior. a cup mounted in and spaced from theinner face of said housing, said cup being closed at the closed end ofthe opposite end. a shoulder on the open end of said cup seated in thehousing shoulder, the

housing and having a flaring mouth at its said cup having intake exhaustand: spark tatably mounted in the closed end of the 15 ports in radialaiinement with the housing housing and fixed t0 the valve member.

intake and exhaust ports and with the spark In testimony whereof I affixmy signature :plug, a valve member rotatably mounted hein presence oftwo witnesses.

tween the cup and housing and having a GEORGE L SCHOFIELD' closed endlocated between the closed end of the housing and the closed end of thecup, \Vitnesses:

and 'having a port adapted for exposing. the LYNN A. ROBINSON, cupports-in proper sequence and a shaft ro- LETA ,E, COATS.

